I think with it being National Trust property there might be issues as they don’t like overflying (whether or not that it is illegal) of their land and properties. Similarly there’s a private steam railway in the area Bodiam to Tenterden and if they are like Bluebell Railway (Sussex) they don’t want drones close. Bodiam is a lovely part of countryside and the stonework of the castle ruins still keeps some of its original majesty.